Rolling mill descaling box outlet damming chain device

Abstract

The utility model relates to metallurgical hot rolling technical field, concretely is a kind of mill descaling box outlet water retaining chain device. Including: mounting bracket, fixedly set in the export outside both sides of descaling box;Supporting crossbeam, detachably erected between mounting bracket;Multiple chains, chain upper end is fixedly connected with supporting crossbeam, chain natural droop forms chain row;Chain row is provided with connecting member, and connecting member connects the chain in chain row and forms water retaining curtain. Effectively overcome the defect that traditional arc water retaining plate is prone to jam when slab retreat, maintenance is inconvenient and the deficiency of insufficient impact stability. The water retaining chain device passes through its flexible curtain structure, not only can reliably intercept the rebound water flow and mill scale generated in descaling process, prevent it from splashing outward, simultaneously allow slab to pass through in descaling box bidirectionally smoothly.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical hot rolling technology, specifically a water-blocking chain device at the outlet of a rolling mill descaling box. Background Technology

[0002] In the hot rolling process of metallurgical production, the descaling process after the heating furnace is crucial to the surface quality of the slab. High-pressure water descaling systems can effectively remove iron oxide scale from the slab surface, but their operation generates a large amount of backflow water. If left uncontrolled, this backflow will splash out of the tank, affecting the environment and equipment stability. Traditional descaling tanks often use an arc-shaped baffle structure to block the water flow. This component is fixedly installed inside the tank, located after the descaling manifold. Figure 1 .

[0003] However, due to limitations in its structure and installation location, this arc-shaped baffle has revealed significant shortcomings in actual operation. Its arc shape faces the outlet direction, making it highly susceptible to mechanical interference when the slab reverses due to process requirements or abnormal handling. This can cause the slab to become stuck inside the tank, requiring considerable time to resolve and severely hindering production. Furthermore, the baffle is subject to wear and tear from prolonged water flow and slab friction, requiring entry into the tank for replacement, resulting in a cumbersome process and high maintenance costs. In addition, the existing structure lacks effective restraint on the swaying of the baffle element when dealing with water flow impacts and slab collisions, posing a risk of unreliable operation. Therefore, a new type of baffle structure is urgently needed that, while ensuring effective water collection and slag blocking functions, can accommodate the smooth bidirectional passage of slabs and offers superior reliability and ease of maintenance. Utility Model Content

[0004] The present invention aims to solve the above problems and thus provide a reliable water-blocking chain device for the outlet of the descaling box of a rolling mill.

[0005] The technical solution adopted by this utility model to solve the aforementioned problem is: A water-blocking chain device at the outlet of a rolling mill descaling box includes: Mounting brackets are fixedly installed on both sides of the outlet of the descaling box; The supporting beam is detachably mounted between the mounting brackets; Multiple chains, with the upper ends of the chains fixedly connected to the supporting crossbeams, and the chains hanging down naturally to form a chain row; The chain bar is equipped with connecting components that connect the chains in the chain bar to form a water-blocking curtain.

[0006] Compared with the prior art, the outstanding features of this utility model, which adopts the above technical solution, are: This design effectively overcomes the shortcomings of traditional arc-shaped baffles, such as easy jamming during slab retraction, inconvenient maintenance and replacement, and insufficient impact resistance. The baffle chain device, with its flexible curtain structure, not only reliably intercepts the rebounding water and iron oxide scale generated during descaling, preventing it from splashing outwards, but also allows the slab to pass smoothly in both directions within the descaling box, fundamentally avoiding jamming. The entire device is located outside the box, greatly simplifying daily inspection, maintenance, and replacement procedures, significantly reducing maintenance costs and time. Furthermore, the connecting components effectively constrain the chain's swing amplitude under water impact or slab collisions, enhancing the overall structural stability and durability, reducing the risk of failure due to excessive component shaking or entanglement, and improving equipment operational reliability.

[0007] As a preferred embodiment, a further technical solution of this utility model is: Furthermore, the number of chain rows is at least two, and the chain rows are arranged in parallel to each other. This structure enhances the coverage density of the water-blocking curtain, reduces the gaps through which water flows, improves the overall interception effect, and makes the water blocking more tight and reliable.

[0008] Furthermore, the chains in adjacent chain rows are arranged in an alternating pattern, which allows the chains in different rows to be misaligned on the projection plane, further filling the gaps between single-row chains, forming a more continuous and effective shielding surface, and improving the sealing performance.

[0009] Furthermore, the connecting component includes at least two horizontally arranged metal rods. The metal rods on the chain are spaced apart along the height direction. The metal rods are welded and fixed to the middle of the chain on the chain. By welding and fixing to the middle of the chain, multiple independent chains are connected into an integrated linkage unit. This effectively suppresses excessive swaying of a single chain, prevents it from becoming disordered or entangled under the impact of water flow and collision with the slab, ensures the stability and consistency of the curtain shape, and extends the service life of the device.

[0010] Furthermore, the mounting bracket includes a pair of symmetrically arranged support seats, with both ends of the support beam mounted on the support seats. This structure provides a stable and reliable mounting foundation, while making the erection and dismantling of the support beam simple and easy, facilitating the rapid maintenance or replacement of the entire device.

[0011] Furthermore, the anchor chain is made of manganese steel, which makes full use of the high strength and excellent wear resistance of manganese steel, enabling it to better withstand the wear caused by the continuous scouring of dephosphorization water and the collision with the slab, thus adapting to harsh working conditions and extending the replacement cycle of key vulnerable parts. Attached Figure Description

[0012] Figure 1 This is a side view of an existing curved plate structure; Figure 2 This is a side view of an embodiment of the present utility model. Figure 3 This is a schematic diagram of the main structure of an embodiment of the present utility model; The following are labeled in the diagram: 1. Descaling box; 2. Mounting bracket; 3. Support beam; 4. Chain bar; 5. Metal round bar. Detailed Implementation

[0013] The present invention will be further described below with reference to embodiments, the purpose of which is only to better understand the content of the present invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0014] A water-blocking chain device at the outlet of a rolling mill descaling box includes: Mounting bracket 2 is fixedly installed on both sides of the outside of the outlet of descaling box 1; The supporting beam 3 is detachably mounted between the mounting brackets 2, and the supporting beam 3 is equipped with lifting lugs for easy hoisting; Multiple chains, with the upper end of the chains fixedly connected to the supporting crossbeam 3, and the chains hanging down naturally to form a chain row 4; The chain row 4 is equipped with connecting components that connect the chains in the chain row 4 to form a water-blocking curtain.

[0015] Furthermore, the number of chain rows 4 is at least two, and the chain rows 4 are arranged in parallel to each other. This structure enhances the coverage density of the water-blocking curtain, reduces the gaps through which water flows, improves the overall interception effect, and makes the water blocking more tight and reliable.

[0016] Furthermore, the chains in adjacent chain rows 4 are arranged in an alternating manner, which allows the chains in different rows to be misaligned on the projection plane, further filling the gaps between single-row chains, forming a more continuous and effective shielding surface, and improving the sealing performance.

[0017] Furthermore, the connecting component includes at least two horizontally arranged φ12 metal rods 5. The metal rods 5 on the chain row 4 are spaced apart along the height direction. The metal rods 5 are welded and fixed to the middle of the chain on the chain row 4. By welding and fixing to the middle of the chain, multiple independent chains are connected into an integral linkage unit. This effectively suppresses the excessive sway of a single chain, prevents it from becoming disordered or entangled under the impact of water flow and collision with the slab, ensures the stability and consistency of the curtain shape, and extends the service life of the device.

[0018] Furthermore, the mounting bracket 2 includes a pair of symmetrically arranged support seats, and the two ends of the support beam 3 are mounted on the support seats. This structure provides a stable and reliable installation foundation, while making the erection and disassembly of the support beam 3 simple and easy, and facilitating the rapid maintenance or replacement of the entire device.

[0019] Furthermore, the anchor chain is made of manganese steel, which makes full use of the high strength and excellent wear resistance of manganese steel, enabling it to better withstand the wear caused by the continuous scouring of dephosphorization water and the collision with the slab, thus adapting to harsh working conditions and extending the replacement cycle of key vulnerable parts.

[0020] During operation, after the slab is descaled by high-pressure water jets inside the descaling box 1, the rebounding water and detached iron oxide scale splash towards the outlet. At this time, the water-blocking chain device located outside the outlet of the descaling box 1 begins to function. The flexible water-blocking curtain formed by its multiple naturally hanging chains effectively intercepts and guides these splashes, preventing them from splashing out of the box. Since this curtain is composed of multiple independent chains and is located above the roller conveyor, when the slab passes through normally during rolling or reverses due to process requirements, the end of the slab can easily push open the flexible chain curtain. The chains adaptively swing in the direction of travel under the thrust of the slab, thus completely avoiding the mechanical interference and jamming problems caused by traditional arc-shaped water-blocking plates as described in the background art. Meanwhile, a horizontal metal rod 5, welded and fixed to the middle of the chain, serves as a connecting component, horizontally connecting multiple chains into a single linkage unit. This structure effectively constrains the swing amplitude of the chain when subjected to violent water flow or accidental collision with the slab, suppresses excessive deflection and swaying of individual chains, prevents them from tangling or becoming structurally unstable, and improves the device's impact resistance reliability and durability. The entire device is fixed to the outside of the box via the mounting bracket 2, so that daily inspection, wear inspection, and maintenance replacement work do not require entering the descaling box 1. If the chain is locally worn, it can be easily repaired locally or disassembled as a whole, greatly simplifying the maintenance process and overcoming the disadvantages of high maintenance cost and long maintenance time of the original structure.

[0021] The above description is only a preferred embodiment of the present utility model and does not limit the scope of the present utility model. All equivalent changes made based on the content of the present utility model specification and its drawings are included within the scope of the present utility model.

Claims

1. A mill descaling box outlet dam chain device characterised in that: include: Mounting brackets are fixedly installed on both sides of the outlet of the descaling box; The supporting beam is detachably mounted between the mounting brackets; Multiple chains, with the upper ends of the chains fixedly connected to the supporting crossbeams, and the chains hanging down naturally to form a chain row; The chain bar is equipped with connecting components that connect the chains in the chain bar to form a water-blocking curtain.

2. The mill scalder box outlet dam bar chain device of claim 1, wherein: There must be at least two chain rows, and the chain rows must be arranged in parallel to each other.

3. The mill scalder box outlet dam bar chain device of claim 2, wherein: The chains in adjacent chain rows are arranged in an alternating pattern.

4. The mill scalder box outlet dam bar chain device of claim 2, wherein: The connecting component includes at least two horizontally arranged metal round bars, which are spaced apart along the height direction on the chain row, and the metal round bars are welded and fixed to the middle of the chain on the chain row.

5. The water-blocking chain device at the outlet of the mill descaling box according to claim 1, characterized in that: The mounting bracket includes a pair of symmetrically arranged support seats, with the two ends of the support beam mounted on the support seats.

6. The mill scalder box outlet dam bar chain device of claim 1, wherein: The anchor chain is made of manganese steel.

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